Oh, but it is. 95% of the time, if it's on the battlefield, it will not be beaten. That number only climbs higher the earlier you get it into play. You won't get a big goofy effect like draw 7 cards or destroy 3 noncreature permanents, but in 3 turns the game will be over all the same. It even has a bonus perk of completely negating the drawbacks on Animate Dead, Dance of the Dead, Necromancy, and even Whip of Erebos.